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A microammeter has a resistance of 100Ω and full scale range of 50µA . It can be used as a voltmeter or as a higher range ammeter provided a resistance is added to it. Pick the correct range and resistance combination

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10 V range with 200kΩ resistance in series

10 mA range with 0.1 resistance in parallel

50 V range with 10kΩ resistance in series

10 mA range with 1Ω resistance in parallel

answer is B.

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Detailed Solution

To convert a galvanometer into an ammeter, a shunt $S = \frac{{{I_g}}}{{I - {I_g}}}G$ is connected in parallel with it. To convert a galvanometer into a voltmeter, a resistance $R = \frac{V}{{{I_g}}} - G$ is connected in series with it

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